Mammut made the Men's Haldigrat GS Hooded Jacket for mountaineering and backcountry touring with rugged waterproofing and light compactness in mind. Its Dry Technology Pro membrane boasts outstanding waterproof, breathable ratings for phenomenal protection from snowfall, powder slashes, and ice. A 3-layer construction makes this jacket surprisingly thin and light so you can pack it away without a problem. There are long zippers under each sleeve to amplify ventilation for skin tracks and sweaty ascents. The powder skirt is removable to transition from touring to mountaineering with ease.